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• CN11 Pin Assignment
To Option board and PS board
Pin No. Pin No. Signal
-8V
0V
0V
NC
NC
0V
0V
INT1-N
IOS0-N
CS2-N
CS4-N
NC
SCSREO-P
SCRREO-P
A08-P
A06-P
A04-P
A02-P
A00-P/ORE-N
A20-P
A17-P
DCAS1-N
A18-P
A15-P
A13-P
+5V
A11-P
A09-P
DRAS2-N
DRAN4-N
D07-P
D05-P
D02-P
D00-P
0V
D14-P
D12-P
D11-P
D09-P
NC
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
02
04
06
08
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
01
03
05
07
09
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Description
Logic ground
Logic ground
EEPROM data
EEPROM clock
EEPROM select
+5V power supply
Interrupt request 2
I/O select 1
ROM select 3
OKIPAGE6ex only, OKIPAGE6e: NC
Reset signal
Address bit 22
Address bit 7
Address bit 5
Address bit 3
Address bit 1
Address bit 21
Address bit 19
DCAS0
RD-N
Address bit 16
Address bit 14
Logic ground
Address bit 12
Address bit 10
WR-N
DRAM select 3
DRAM select 5
Data bit 6
Data bit 4
Data bit 3
Data bit 1
+5V power supply
Data bit 15
Data bit 13
Data bit 10
Data bit 8
Logic ground
Signal
0V
0V
SSTXD-P
EEPRMCLK-P
EEPRMCS1-P
+5V
INT2-N
IOS1-N
CS3-N
NC
DDRAS1-N
RESET-N
NC
A22-P
A07-P
A01-P
A03-P
A05-P
A21-P
A19-P
DCAS0-N
RD-N
A16-P
A14-P
0V
A12-P
A10-P
WR-N
DRAS3-N
DRAS5-N
D06-P
D04-P
D03-P
D01-P
+5V
D15-P
D13-P
D10-P
D08-P
0V
I/O
C
C
C
O
O
O
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
C
C
C
C
O
C
C
C
C
C
I/O
O
C
C
C
C
I
O
O
O
I
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
C
C
C
Description
-8V power supply
Logic ground
Logic ground
Logic ground
Logic ground
Interrupt request 1
I/O select 0
ROM select 2
ROM select 4
SCC receive request
SCC send request
Address bit 8
Address bit 6
Address bit 4
Address bit 2
OR write enable
Address bit 20
Address bit 17
DCAS1
Address bit 18
Address bit 15
Address bit 13
+5V power supply
Address bit 11
Address bit 9
DRAM select 2
DRAM select 4
Data bit 7
D05-P Data bit 5
D02-P Data bit 2
D00-P Data bit 0
Logic ground
Data bit 14
Data bit 12
Data bit 11
Data bit 9
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40